Thermal regimes of HTS cylinders operating in devices for fault current limitation

Abstract

We reveal obstacles related to the application of HTS cylinders in current limiting devices based on the superconducting - normal state transition. It is shown that, at the critical current density achieved presently in bulk materials, and especially in BSCCO-2212, the required thickness of the cylinder wall in a full-scale inductive device achieves several centimeters. A simple mathematical model of the operation of an inductive fault current limiter (FCL) is used to show that such cylinders cannot be cooled in admissible time after a fault clearing and, hence, the inductive FCLs and current-limiting transformers employing BSCCO cylinders do not return to the normal operation in the time required. For the recovery even with a non-current pause in the circuit, the cylinders are needed with the critical current density by an order higher than the existed ones.

arXiv comment15 pages, 5 figures

References in corpus (3)

• The Flux-Line Lattice in Superconductors
• Experimental study of a transformer with superconducting elements for fault current limitation and energy redistribution
• Calculation principles for a superconducting inductive FCL and a current-limiting transformer

Cited by in corpus (3)

• Implementation of Resistive Type Superconducting Fault Current Limiters in Electrical Grids: Performance Analysis and Measuring of Optimal Locations
• An improved design of an inductive fault current limiter based on a superconducting cylinder
• Calculation principles for a superconducting inductive FCL and a current-limiting transformer